Why Add Line Numbers
- Prefixes each line with a right-aligned line number.
- Padding adjusts automatically based on total line count.
- Useful for sharing log snippets or quoting code.
Common questions
Is Add Line Numbers free to use?
Yes. Add Line Numbers is completely free. There is no sign up, no trial, and no usage cap.
Do I need an account to use Add Line Numbers?
No. You can start using Add Line Numbers straight away. We do not ask for an email address or a login.
Is my data uploaded to a server when I use Add Line Numbers?
No. Add Line Numbers runs entirely inside your browser, so the text you enter never leaves your device and nothing is sent to us.
Do you store the text I use with Add Line Numbers?
No. Because everything happens locally in your browser, there is nothing for us to store. Close the tab and it is gone.
Is there a character or word limit in Add Line Numbers?
There is no fixed limit. Because Add Line Numbers runs in your browser, only very large amounts of text may slow things down.
Does Add Line Numbers keep my text private?
Yes. Your text is processed locally in the browser and is not sent to a server.
How do I use Add Line Numbers?
Enter or paste your text and Add Line Numbers updates the result as you go. When it looks right, copy or download it with one click.
Does Add Line Numbers work on phones and tablets?
Yes. Add Line Numbers is responsive and works in any modern browser on mobile, tablet, and desktop.
Which browsers does Add Line Numbers support?
It works in current versions of Chrome, Firefox, Safari, and Edge. For the best experience, keep your browser up to date.
Is there a limit on how often I can use Add Line Numbers?
No. You can use Add Line Numbers as many times as you need, at no cost.
Can I use Add Line Numbers for commercial or client work?
Yes. You are free to use the output in personal, educational, and commercial projects.
Why is Add Line Numbers free?
The site is supported by advertising, which lets us keep every tool free and open to everyone.
What should I do if Add Line Numbers gives an unexpected result?
First check that your text is formatted as expected. If something still looks wrong, use the feedback link on the page and we will take a look.